HorizonSnapshot

The list of horizon paths, consisting of the main path and zero or more sub-paths. The main path is the path on which the vehicle is located. A sub-path is any path in the horizon snapshot that is not the main path.

The list of horizon positions ordered by decreasing likelihood of match. The first position is the best map-matched position. If the first position is off-road, there may be other on-road positions following it that indicate possible places for the vehicle on the roads around it, but the vehicle is still considered to be driving off-road.